I found this information.

That quiescent sensor current of 10mA when OFF would seem to present a problem.
You don't want the current to increase too much beyond that or the power dissipation will become unacceptable high, as the quiescent current already dissipates over 2W.
One way would be to add a comparator circuit to detect a small difference between the ON current and the OFF quiescent current to minimize the power.

 

Measure the voltage across R2 when the sensor is ON and OFF

 

Perhaps a better way would be to detect the voltage across the sensor.
That would energize the opto when the sensor is OFF, but that should minimize the power problem.
The signal inversion could be easily compensated by inverting the opto output circuit configuration.

 

@abuhafss
Try this circuit:

 

Use a small transformer instead if the opto circuit. The leakage current might just match the magnetisation current of the transformer, especially if it's a rather cheap and nasty transformer,

 

Try this circuit:

That's more or less what I was thinking of.

 

That's more or less what I was thinking of.

Excuse me, I did not know about that!

 

Excuse me, I did not know about that!

Nothing to apologize for.
I only posted my idea about 15 minutes before you posted your circuit, so I assume you were working on it before my post.

 

It would seem that residual current is a very variable parameter between devices.
this one has only 600uA, which would be considerably easier to deal with.

 

@abuhafss
Try this circuit:
View attachment 299248

I have connected as below:

Sensor is shown in RED.
This configuration is not working. The sensor does not gets ON, the opto-coupler is constantly ON.

 

This configuration is not working. The sensor does not gets ON, the opto-coupler is constantly ON.

Breakdown voltage BZX84C15 is 15 V.
Try to connect two zeners 8.2 V in series.
ADDED:
If optocoupler still constantly ON, decrease resistor 33 k to 10 k.
BTW, nominal voltage of capacitor 100 μF should be at least 25 V.

 

Breakdown voltage BZX84C15 is 15 V.
Try to connect two zeners 8.2 V in series.
ADDED:
If optocoupler still constantly ON, decrease resistor 33 k to 10 k.
BTW, nominal voltage of capacitor 100 μF should be at least 25 V.

I added 8.2V zener in series, now the coupler is constantly off.
The voltage across 33k is 17.5V and on pin #1 of the coupler 1.12V.
Yes, the cap is 100µF/25V.

Replacing 33K with 10K resulted 11.9V across 10k and 0.6V on pin #1 of the coupler. Of course the coupler is off.
In both cases, the sensor does not gets ON.

 

Measure the leakage current.
Then you can work it out.

 

I think the 37K resistor is too large. Connect this circuit as a test and measure the voltage across the 20K resistor when the sensor is ON and OFF.

 

I think the 37K resistor is too large. Connect this circuit as a test and measure the voltage across the 20K resistor when the sensor is ON and OFF.

View attachment 299304

I had replaced 37k with 165k, I informed that in post #13.

As for the test circuit, the voltage across 22k resistor is 223V when sensor is ON and 33V when sensor is OFF.

 

I don’t understand why the solution given in the datasheet is being ignored by everyone. Can someone please explain. Why not try various bleeder resistors, positioned as in the datasheet, not where the TS wants to put it?

 

As for the test circuit, the voltage across 22k resistor is 223V when sensor is ON and 33V when sensor is OFF.

That will work. Only need a 1/2 wave rectifier off the 20K and appropriate value resistors for the pc817

 

That will work. Just need a 1/2 wave rectifier off the 20K .

How will the circuit turn off when the voltage across the resistor is over 30V?

 

I added 8.2V zener in series, now the coupler is constantly off.
The voltage across 33k is 17.5V and on pin #1 of the coupler 1.12V.

Good. Then optocoupler is definitely ON. Not OFF.
What is load of optocoupler transistor?
It should be about 10 k in your case (because of small input current).

 

How will the circuit turn off when the voltage across the resistor is over 30V?

The opto is off when the voltage is 30 volts. When the sensor is ON the opto is on.